Pagenavi by multiple field search wordpress - wordpress

Question

I am using the pagenavi plugin and mutiple search by taxonomy and acf custom field. However pagenavi is not working on the query search.
add_filter( 'pre_get_posts','nt_custom_search_filter');
function nt_custom_search_filter( $query ) {
if( $query->is_search && !is_admin() ) {
if( isset($_GET['s'] ) ) {
$query->set( 'post_type', array( 'product' ) );// box text search
}
if( $query->is_main_query() ) {
$args[] = array( 'relation' => 'AND' );
if( isset( $_GET[ 'product_cat' ] ) && $_GET[ 'product_cat' ] != 'all' ) {
$args[] =
array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => $_GET['product_cat']
);
}$query->set( 'tax_query', $args );
$meta_query = array( 'relation' => 'AND' );
if( isset( $_GET[ 'status' ] ) && $_GET[ 'status' ] != 'all' ) {
$meta_query[] = array(
'key' => 'status',
'value' => $_GET['status'],
'compare' => '='
);
}
$query->set( 'meta_query', $meta_query );
}
}
return $query;}

Answer 1

To solve possible problems with an incorrect calculation of the pagination in WP_Query, you need three additional arguments: posts_per_page, paged and offset
In $count we save the number of posts per page, or just use the default which you have set in your wordpress backend under the settings.
$paged tells us which page the user is currently on.
With $offset you calculate how many contributions the loop should be moved.
So you can adjust the $args[] in your $query. Code can look like:
$count = get_option('posts_per_page', 25); // get 25 posts
$paged = get_query_var('paged') ? get_query_var('paged') : 1;
$offset = ($paged - 1) * $count;
$args = array (
'posts_per_page' => $count,
'paged' => $paged,
'offset' => $offset,
'relation' => 'AND'
.
. /* other arguments */
:
);
Edit:
so your code can look like the following. Please notice, that the code is not tested.
add_filter( 'pre_get_posts','nt_custom_search_filter');
function nt_custom_search_filter( $query ) {
if( $query->is_search && !is_admin() ) {
if( isset($_GET['s'] ) ) {
$query->set( 'post_type', array( 'product' ) );// box text search
}
if( $query->is_main_query() ) {
$count = get_option('posts_per_page', 25); // get 25 posts
$paged = get_query_var('paged') ? get_query_var('paged') : 1;
$offset = ($paged - 1) * $count;
$args[] = array( 'posts_per_page' => $count, 'paged' => $paged, 'offset' => $offset, 'relation' => 'AND' );
if( isset( $_GET[ 'product_cat' ] ) && $_GET[ 'product_cat' ] != 'all' ) {
$args[] =
array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => $_GET['product_cat']
);
}$query->set( 'tax_query', $args );
$meta_query = array( 'relation' => 'AND' );
if( isset( $_GET[ 'status' ] ) && $_GET[ 'status' ] != 'all' ) {
$meta_query[] = array(
'key' => 'status',
'value' => $_GET['status'],
'compare' => '='
);
}
$query->set( 'meta_query', $meta_query );
}
}
return $query;}